Superconducting Analogues of Quantum Optical Phenomena: Macroscopic Quantum Superpositions and Squeezing in a SQUID Ring

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dc.creatorEveritt, M. J.
dc.creatorClark, T. D.
dc.creatorStiffell, P. B.
dc.creatorVourdas, A.
dc.creatorRalph, J. F.
dc.creatorPrance, R. J.
dc.creatorPrance, H.
dc.date2003-07-24
dc.date2003-12-12
dc.date.accessioned2026-07-07T06:07:25Z
dc.date.available2026-07-07T06:07:25Z
dc.descriptionIn this paper we explore the quantum behaviour of a SQUID ring which has a significant Josephson coupling energy. We show that that the eigenfunctions of the Hamiltonian for the ring can be used to create macroscopic quantum superposition states of the ring. We also show that the ring potential may be utilised to squeeze coherent states. With the SQUID ring as a strong contender as a device for manipulating quantum information, such properties may be of great utility in the future. However, as with all candidate systems for quantum technologies, decoherence is a fundamental problem. In this paper we apply an open systems approach to model the effect of coupling a quantum mechanical SQUID ring to a thermal bath. We use this model to demonstrate the manner in which decoherence affects the quantum states of the ring.
dc.description9 pages, 10 figures, To be submitted to Phys. Rev. A. (changes for referee's and editior's comments - replaced to try to get PDF working)
dc.identifierhttps://arxiv.org/abs/quant-ph/0307175
dc.identifierhttp://arxiv.org/abs/quant-ph/0307175
dc.identifierPhys. Rev. A 69, 043804 (2004)
dc.identifierdoi:10.1103/PhysRevA.69.043804
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/91286
dc.subjectQuantum Physics
dc.subjectSuperconductivity
dc.titleSuperconducting Analogues of Quantum Optical Phenomena: Macroscopic Quantum Superpositions and Squeezing in a SQUID Ring
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